The metacentric height

Richelieu was designed by Henri Dupuy de Lôme as a improved version of the Océan-class ironclads. As a central battery ironclad she had her armament concentrated amidships. Like most ironclads of her era she were equipped with a plough-shaped ram that projected 10 feet (3.0 m) from her hull.[1] Her crew numbered around 750 officers and men. The metacentric height of the ship was very low, a little above 1.5 feet (0.5 m).[1]
The ship measured 101.7 meters (333 ft 8 in) overall, with a beam of 17.4 meters (57 ft 1 in). Richelieu had a maximum draft of 8.5 meters (27 ft 11 in)[2] and displaced 8,984 metric tons (8,842 long tons).[1]
[edit]Propulsion
Richelieu was given two propellers by Dupuy de Lôme to make her more maneuverable for ramming. She had two Indret 3-cylinder horizontal return connecting rod compound steam engine, each driving a single propeller. Her engines were powered by eight oval boilers.[1] On sea trials the engine produced 4,600 indicated horsepower (3,400 kW) and Richelieu reached 13.2 knots (24.4 km/h; 15.2 mph).[3] She carried 640 metric tons (630 long tons) of coal which allowed her to steam for approximately 3,300 nautical miles (6,100 km; 3,800 mi) at a speed of 10 knots (19 km/h; 12 mph).[2] Richelieu was initially square rigged with three masts, then then cut down to a schooner rig.[3]





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